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When a permit is required
Permit triggers and exempt work for O'Fallon
New construction, additions, remodels, accessory structures, many trade permits, and other regulated work under city code.
Note: No consolidated public exemption list was located on the public pages reviewed.
- Permit form
- Plans and specifications
- Site plan or plat information as applicable
- Contractor data
- Project valuation
- Building code
- City enforces locally adopted construction codes; exact edition should be confirmed from city ordinance before application.
- Contractor requirements
- City administers contractor licensing and registration tied to permit issuance.
Application process
Application → plan check → issuance → inspection → final
- 01 Verify permit type with Planning and Development and check for zoning, engineering, or right of way reviews.
- 02 Prepare permit application, plans, and contractor information.
- 03 Submit through the City permit process.
- 04 City completes review and returns comments if revisions are required.
- 05 Fees are paid after approval.
- 06 Permit is issued and inspections are scheduled with the City.
Source: City of O'Fallon Planning and Development Department ↗
Fee schedule
O'Fallon building permit fees
Paid through the City permit process.
Fees change periodically. Confirm at the official fee schedule ↗ before budgeting.
Required inspections
Scheduling and sequence
- City after permit issuance (phone)
Typical sequence: Footing/foundation, rough framing and trades, then final inspections.
Frequently asked
Common questions about O'Fallon permits
01 Do I need a building permit in O'Fallon, MO? ▸
02 How much does a building permit cost in O'Fallon, MO? ▸
03 How do I apply for a building permit in O'Fallon, MO? ▸
04 How do I schedule a building inspection in O'Fallon, MO? ▸
Educational reference. Permit rules and fees change — confirm current requirements directly with City of O'Fallon Planning and Development Department before applying. Jaspector is not legal advice.